Tractor drawn grader



June 11, 1935. J s N ET AL 2,004,846

TRACTOR DRAWN GRADER Filed y 9, 1934 4 Sheets-Sheet 1 3mm; g Jhn Jizmesdllzls'an O k Jamesfleasaniiy June 11, 1935. J 1 ALLISON HAL 2,00434 TRACTOR DRAWN GRADER Filed July 9, 1934 I 4 Sheets-Sheet 2 Jblm Jmzesflllisan Jzma-Pleasanf 11f abbmmmj June 11, 1935.

J. J. ALLISON ET AL TRACTOR DRAWN GRADER 4 Sheets-Shet 5 Filed July 9, 1934 Jhn Jhmeo/Jllison ufimes Pleasani117 7 June 11, 1935. v

J. J. ALLISON ET AL. 2 ,004,846

TRACTOR DRAWN GRADER File ul 9 193 4 Sheets-Sheet 4 i I 1 l 36 v 26 M :3 1 3?: 35 j 93- 33 aw WW5 v :Tolm dilmesflllison (Jimzes ZZeasanil Patented June 11,1935 I 2 004 345:

UNITED STATES PATENT OFFICE TRACTOR. DRAWN GRADER John James Allison and James "Pleasant Ivy,

- Chandler, Ariz.

Application July 9, 1934, Serial No. 734,398-

Claims. (01. 37-164) invention relates to tractor drawn graders Referring now to these figures, the frame of which while capable of general scraping and the grader includes a pair of spaced apart pargrading I operations is especially designed and allel side bars 10, whose curved forward ends adapted for grading operations in connection are united approximately in a semicircle as at II .51: with irrigated lands, and for this reasonhas for and whose forward portions are, connected by 5 one of its primary purposes the provision of, aacurved cross member I2 which forms with the lasting efficient machine, capable of control in said curved forward portions II of the side bars, its operation, and of the adjustments usually acircular housing. This housing, irrespective made duringsuch operation, by the single opof the particular shape of the major portions of erator-necessary for the control and operation of the side bars, presents an inwardly opening chan- 10 th tr t r itself, nel as may be plainlyseen in Figures 4 and 6 and Among its further objects the invention conin this channel is movably disposed a turntabletemplates maximum of ease and flexibility in the I3 formed, fo x p fr m n n l bar and various adjustments made essential by the chosen provided at diametrically opposite points with l5 'us e of the invention as above set forth,-these depending "forwardly curved blade supporting adjustments including the setting or angular bars I 4. position or the blade usually-accomplished at Th ross m mber which f rms a part of. the start of operations, and also the vertical adthe abovehousing, and which may be addition-' justment at either one or both sides of the blade ally supp fr m he f m si rs in y a which so frequently becomes necessary during O 53 6 5 a t a point ntermediate its 20 operation. 7 nd Vertically aligned openings for the reception v still further, theinve tio contemplates of an anchor bolt I6, and the turntable I3 has a tractor drawn grader so arranged and adjustable se O p n ngs I1 ,(see Figure 5), along a as topermit of throwing the full Weightv of the 10 1 thereof, selected ones of which may be 26 machine on the blade A and insuring, uniformly rought into registry wit h i n p nin of effective results, and the invention al o onthe cross member I2 to receive the anchor bolt I6 templates many details in the structure arrange and thus anchor the turntable I3 in selected ment, support, adjustment and cooperation of DO O I 9 its various parts, mutually contributing to the Th d e n b d upp in bars I4 are 30* strength,-durabi-lity, and, at the same time, simpr f rab y pp r d nd br by a ner l y pl jcit f th hi as a, hom, I U-lshaped brace member I8 whose extremities are With the above and certain .other objects. in. made fast to the bars I4 intermediate the ends of mind, the inventionv may be better. understood the 3 Sub y below the turnand more thoroughly appreciateddby reference. tab e '3 and Whose ish por i n i ilarl 36 to the following description of its Various f-ea-, m e L h n b et d. ith regard, to the accompanying. The blade I9 which, in use, extends generally in drawings, which fgrm a, part of this specification a. direction transverse t0 the longitudinal axis and in which of the machine, and as shown is transversely Figure vl ista sideaelevation of the completec ve pr vide a forwardly set lower cutting 0 grader showing certain parts .of the tractor lltilr' edge, has rearwardly projecting pivotal arms 20 40 ized in the drawings thereof, I pivot'ally connected at 2| to the lower extremities Figure 2 is a diagrammaticplanview showing of th e blade supporting bars I4. Above these the pressure generator and the rear wheel. conpivoted arms, and at or about its upper edge, the trol cylinders with their pressure connections, blade I9 has rearwardly, extending adjusting Figure 3 is a top plan view, of the complete arms 22, each provided with aseries of openings, grader, I I selected ones of which may receive clamping bolts Figure 4 is a vertical longitudinal section 23 extending also through the bar I4 at points taken centrally through the grader, above the lower blade pivots, so that the trans- Figure 5 is a horizontal section taken through verse inclination of the blade I9 may be readily 59 the forward portion of the frame, changed from time to time, as occasion or the Figures 6 and '7 are vertical transverse sections nature of the work requires. taken respectively on lines 6-6 and'l'l of Fig- Obviously, by the use of the turntable adjusture3, and .7 ment, the angular setting of the blade I9 with' Figure 8 is -a detail longitudinal section taken respect to the longitudinal axis of the machine -9 through one of the wheel control cylinders. may be varied, as the materialis to be thrown more or less to the right or left side of the machine.

Centrally of its forward curved portion II the frame has a forwardly projecting hitch bar 24, the forward downturned portion of which bar sup- 7 ports a swiveled connecting ring 25 for adjustable connection with the rear clevis 26 of a tractor generally indicated at 21 in Figure 1, and which for most purposes will preferably be of the caterpillar type.

For a purpose which will be presently plain, there is mounted on the tractor 21 a pressure generator in the nature of a pump generally indicated at 28, having highand low pressure connections with a four-way valve 29. mounted within convenient reach of the operators seat 30 and from which flexible lines 3l lead, and are con nected, to pressure pipes 32 mounted and extending rearwardly along the frame side bars ID.

The grader is supportedbya pair of wheels 33, each of which is disposed below the rearend portion of oneof the side bars l0, each wheel axle 34 being journalled at its ends through the central journals 35 of a pairof wheel supporting bars 36 whose portions at opposite sides of the-journals 35 are at an angle with respect to one another approximating a right angle. i

The rear ends of the supporting bars 36 of each wheel are pivotally connected upon oppo- 30" site sides of the respective frame bars ID by transverse pivot bolts 31, and theforward ends are similarly connected to the rear free end of a piston rod 38, the piston 39 of which, as most plainly seen in Figure 8, works within a -down-' wardly and rearwardly inclined cylinder 40 hav sure lines 43 entering the upper forward ends of tion of the main frame in operation. It is fu rthermore obvious that this adjustment may be accomplished with considerable facility and promptness as occasion arises by reason of the fact that thecontrol valve'29 is mounted within the easy reach of the operator of the tractor.

I The rear portion of themain frame, that is the rear portions of the side bars I0, is preferably completed by cross frame members and '45 which, with the remaining portions of the frame as well as the wheel adjusting arrangement and the turntable I3 and its parts, combine to form a considerable weight for holding the cutting edge of the blade steadily and uniformly in the soil during operation and this weight, so necessary in many operations, it is proposed to increase by utilizing supporting wheels 33, as best shown in Figure 7, in the form of drums, each completely closed with the exception of a screw closure member 46, by which, when desirable or necessary, the hollow spaces within the wheels may be filled with Water or other weighty fluid.

What we claim is:

1. A tractor drawn grader having a forward tractorhitch andrear supporting wheels, and including side bars, the forward portions of which arerounded in connection with one another. in. approximately a semicircle, a curved cross member connecting the forward ends of the side bars and forming, with their said for- 'ward rounded ends, an inwardly opening channel, provided at one point with vertically aligned openings, a turntable movable within said channel and having a series of apertures therealong for selective alignment with the openings of the said housing, an angle bolt for extension through the openings of the house and the apertures of said turntable to secure the latter in adjusted position, a pair of depending blade supporting bars in connection with said turntable, and a 7 "channel orhousing of circular form, a turntable movable within said housing, mea ns toadj l t' ably lock the turntable against movement'in the portion of said turntable and having connection lower portions of said supporting bars and also having means adjustably in connection with the ofthe blade with;

bars for varying the inclination respect to the bars. 3. A tractor drawn grader having rear'supporting wheels'and a main frame provided at its forward portion with a tractor hitch, said frame including spaced apart side bars in connection with one another at their forward ends, and a curved cross member forming, with the connect-:

ed forward ends, of the frame bars, a turntable housing, a turntable adjustable within said hous- U ing, means for locking the turntable in adjusted position, depending braced supports carried by v the turntable, and a blade in pivotal-adjustable,

connection with 'said supports;

4. A tractor drawn grader'including a framfe:

having a tractor hitch at its. forward end, a blade beneath and in adjustable" connection withfthev forward portion of the framefrear' wheels below the. rearside portions of the frame,[a' pairgof an gular wheel supporting bars intermediate the ends of which the wheels are journalled,js aidj bars having upwardly extending forward and rear ends of which said rear endsare in pivotal connection with the rear side portions of the; frame, pressure cylinders, each in pivotaljcon' -j nection with one side portion of the frame for wardly of the wheelsgpistons in said cylinders having rods pivotally connected'at the rear endsjj' thereof to the said forward ends of the 'suppQrt'-" ing bars of the wheels,pressure supply1means, and valvedpressure control connections leading,

from said supply means. into the saidicylinders forwardly 'of. the pistons thereof.

5. A tractor drawn grader including a frame;

havingspaced apart side bars and a forward tractor hitch, a blade beneath, and in adjustable connection with, the forward portion ofsaid frame, wheels beneath the rear side portions of the frame, angular supporting bars having journals intermediate their ends for'the wheels and" having upwardly and rearwardly inclined portions in pivotal connection with the rear per-- tions of the frame side bars, pressure cylinders in pivotal connection at their forward ends with the side bars of. the frame andinclinedrearE-I wardly and downwardly below the frame, pistons in said cylinders having rearwardly projecting rods in pivotal connection with the upper forward ends of the wheel supporting bars, tractor actuated pressure supply means, pressure supply lines connecting said supply means with the said cylinders forwardly of 'the pistons of the latter, and a control valve in said supply means mounted adjacent to the operators station of the tractor for independently controlling the pressure supply to, and. relief from, the said cylinders.

JAMES PLEASANT IVY. JOHN J. ALLISON. 

